The diet can change when home changes
A family can move from vegetarian meals to meals that include egg or meat. Change the saved diet when the kitchen changes, so the app stops offering food you no longer want off, or starts keeping it off.

Change it before the next week
Do it before you build the next week. The plate should match the house.
A diet changed in the middle of a meal confuses everyone who feeds the child. Pick the sentence, then cook.
Allergies stay
A diet change does not erase an allergy. Egg can join the diet and still stay off if egg is an allergy. Milk stays off if milk is an allergy.
Cheese and yogurt follow milk. Chicken follows the meat diet. The app removes foods that clash.
Tell the other adults
The other parent, daycare, and grandparents need the new sentence. “Includes egg. No meat or fish.” Or whatever the house decided.
One familiar food should survive the change, so dinner is not all new on the same night the rule changes.
A sentence you can say
“The kitchen changed. We’ll set the diet before the next week.”